This is the Speech Synthesis script I wrote for GreaseMonkey while listening to "My Vampire System" by Jksmanga. 

My Vampire System: https://readnovelfull.com/my-vampire-system-v1.html

Features: 
Synthesis rate up to 10 instead of the 2 Firefox Reader is limited to.
Auto load next page.
Auto play on page load.
Scroll down to paragraph being read.
Scroll when paragraph is below scroll (broken).
Select paragraph to read from.